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Seasonal variations of microbial community and antibiotic resistome in a suburb drinking water distribution system in a northern Chinese city

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Journal of Environmental Sciences 2023年第5期127卷 714-725页

作者： Yanchu Ke Wenjun Sun Zibo Jing Zhinan Zhao Shuguang Xie State Key Joint Laboratory of Environmental Simulation and Pollution Control College of Environmental Sciences and EngineeringPeking UniversityBeijing 100871China School of Environment Tsinghua UniversityBeijing 100084China Research Institute for Environmental Innovation(Suzhou)Tsinghua Suzhou 215163China

Antibiotic resistance genes(ARGs)are an emerging issue for drinkingwater ***,the seasonal variation of ARGs in drinking water distribution systems(DWDS)is still *** work revealed the tempo-spatial changes of microbial community,ARGs,mobile genetic elements(MGEs)co-occurring with ARGs,ARG hosts in DWDS bulk water by means of metagenome *** microbial community and antibiotic resistome varied with sampling season and ***,ammonia,chlorite and total plate count(TPC)drove the variations of microbial community ***,environmental parameters(total organic carbon(TOC),chlorite,TPC and hardness)shifted antibiotic *** and MGEs co-occurring with ARGs showed higher relative abundance in summer and autumn,which might be attributed to detached pipe *** particular,ARG-bacitracin and plasmid were the predominant ARG and MGE,*** hosts changed with season and site and were more diverse in summer and *** winter and spring,Limnohabitans and Mycobacterium were the major ARG hosts as well as the dominant genera in microbial *** addition,in summer and autumn,high relative abundance of Achromobacter and Stenotrophomonas were the hosts harboring many kinds of ARGs and MGEs at site in a residential zone(0.4 km from the water treatment plant).Compared with MGEs,microbial community had a greater contribution to the variation of antibiotic *** work gives new insights into the dynamics of ARGs in full-scale DWDS and the underlying factors.

关键词： drinking water distribution system Seasonal change Microbial community Antibiotic resistance genes Mobile genetic elements

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Application of Ice Pigging in a drinking water distribution system:Impacts on Pipes and Bulk water Quality

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Engineering 2024年第9期40卷 122-130页

作者： Yujing Huang Zhiwei Chen Guilin He Yu Shao Shuang Song Feilong Dong Tuqiao Zhang College of Civil Engineering and Architecture Zhejiang UniversityHangzhou 310027China Suzhou Wuzhong water Co. Ltd.Suzhou 215128China School of Municipal and Environmental Engineering Shandong Jianzhu UniversityJi’nan 250101China College of Environment Zhejiang University of TechnologyHangzhou 310014China

Ice pigging is an emerging technique for pipe cleaning in drinking water distribution ***,substantial confusion and controversy exist on the potential impacts of ice pigging on bulk water *** study monitored the microstructural features and composition of sediments and microbial community structures in bulk water in eight multimaterial Chinese *** concentration analysis demonstrated that separate cleaning of pipes with different materials in complex networks could mitigate the risk of losing ice pigs and degrading water *** microstructural and trace element characterization results showed that ice pigs would scarcely disturb the inner surfaces of long-used *** bacterial richness and diversity of bulk water decreased significantly after ice ***,correlations were established between pipe service age,temperature,and chloride and total iron concentrations,and the 15 most abundant taxa in bulk water,which could be used to guide practical ice pigging operations.

关键词： Ice pigging Pipe cleaning drinking water distribution system Bacterial community Sediments

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Review Study on the Accumulation and Release of Trace Metal Elements on Aluminum Containing Sediments in drinking water distribution system

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Research and Application of Materials Science 2020年第1期2卷 34-38页

作者： Xiaoni ZHANG Jinghua MENG Li CHEN Huanhuan ZUO Wendong WANG School of Civil Engineering City College of Science and Technology Chongqing UniversityChongqingChina School of Human Settlements and Civil Engineering Xi'an Jiaotong UniversityXi'anChina

Accumulation and releasing of trace metal elements on aluminum containing sediments of inner drinking water pipe is discussed,as studied from five variations effecting:raw water quality,chemical reagents,solution pH and drinking water flow *** order to decrease the release of trace metal elements,and to ensure the pipe operation and human safety,water quality adjustment is suggested to avoid aluminum containing sediments formation in drinking distribution *** maximum amounts of accumulation of common trace metal elements are *** trends of development in this field are also proposed.

关键词： drinking water distribution system aluminum containing sediments trace metal elements accumulation release

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Review on corrosion and corrosion scale formation upon unlined cast iron pipes in drinking water distribution systems

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Journal of Environmental Sciences 2022年第7期34卷 173-189页

作者： Haiya Zhang Dibo Liu Lvtong Zhao Jun Wang Shuguang Xie Shuming Liu Pengfei Lin Xiaojian Zhang Chao Chen State Key Joint Laboratory of Environmental Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China State Key Joint Laboratory of Environmental Simulation and Pollution Control College of Environmental Sciences and EngineeringPeking UniversityBeijing 100871China Research Institute for Environmental Innovation(Suzhou) TsinghuaSuzhou 215163China State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental SciencesBeijing 100012China

The qualified finished water from water treatment plants(WTPs) may become discolored and deteriorated during transportation in drinking water distribution systems(DWDSs), which affected tap water quality seriously. This water stability problem often occurs due to pipe corrosion and the destabilization of corrosion scales. This paper provides a comprehensive review of pipe corrosion in DWDSs, including corrosion process, corrosion scale formation, influencing factors and monitoring technologies utilized in DWDSs. In terms of corrosion process, corrosion occurrence, development mechanisms, currently applied assays, and indices used to determine the corrosion possibility are summarized, as well as the chemical and bacterial influences. In terms of scale formation, explanations for the nature of corrosion and scale formation mechanisms are discussed and its typical multilayered structure is illustrated. Furthermore, the influences of water quality and microbial activity on scale transformation are comprehensively discussed. Corrosion-related bacteria at the genus level and their associated corrosion mechanism are also summarized. This review helps deepen the current understanding of pipe corrosion and scale formation in DWDSs, providing guidance for water supply utilities to ensure effective measures to maintain water quality stability and guarantee drinking water safety.

关键词： Corrosion Scale formation water quality stability drinking water distribution system Iron pipe water supply safety

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Molecular ecological networks reveal the spatial-temporal variation of microbial communities in drinking water distribution systems

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Journal of Environmental Sciences 2023年第2期124卷 176-186页

作者： Zibo Jing Zedong Lu Zhinan Zhao Wenfeng Cao Weibo Wang Yanchu Ke Xiaohui Wang Wenjun Sun Beijing Engineering Research Center of Environmental Material for water Purification College of Chemical EngineeringBeijing University of Chemical TechnologyBeijing 100029China School of Environment Tsinghua UniversityBeijing 100084China Research Institute for Environmental Innovation(Suzhou)Tsinghua Suzhou 215163China State Key Joint Laboratory of Environmental Simulation and Pollution Control College of Environmental Sciences and EngineeringPeking UniversityBeijing 100871China

Microbial activity and regrowth in drinking water distribution systems is a major concern for water service ***,previous studies have focused on the microbial composition and diversity of the drinkingwater distribution systems(DWDSs),with little discussion on microbial molecular ecological networks(MENs)in different water supply *** analysis explores the potentialmicrobial interaction and the impact of environmental stress,to explain the characteristics of microbial community *** this study,the random matrix theory-based network analysis was employed to investigate the impact of seasonal variation including water source switching on the networks of three DWDSs that used different disinfection *** results showed that microbial interaction varied slightly with the seasons but was significantly influenced by different ***,identified as key species,play an important role in the *** UV-chlorine disinfection can effectively reduce the size and complexity of the network compared to chlorine disinfection alone,ignoring seasonal variations,which may affect microbial activity or control microbial regrowth in *** study provides new insights for analyzing the dynamics of microbial interactions in DWDSs.

关键词： drinking water distribution system Molecular ecological network water source switch UV-chlorine combined disinfection

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A red water occurrence in drinking water distribution systems caused by changes in water source in Beijing, China： mechanism analysis and control measures

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Frontiers of Environmental Science & Engineering 2014年第3期8卷 417-426页

作者： Xiaojian ZHANG Zilong MI Yang WANG Shuming LIU Zhangbin NIU Pinpin LU Jun WANG Junnong GU Chao CHEN School of Environment Tsinghua University Beijing 100084 China Beijing General Municipal Engineering Design and Research Institute Beijing 100082 China Ministry of Housing and Urban-Rural Construction Beijing 100037 China Beijing water Works Group Beijing 100192 China

A red water phenomenon occurred in several communities few days after the change of water source in Beijing, China in 2008. In this study, the origin of this problem, the mechanism of iron release and various control measures were investigated. The results indicated that a significant increase in sulphate concentration as a result of the new water source was the cause of the red water phenomenon. The mechanism of iron release was found that the high-concentration sulphate in the new water source disrupted the stable shell of scale on the inner pipe and led to the release of iron compounds. Experiments showed that the iron release rate in the new source water within pipe section was over 11-fold higher than that occurring within the local source water. The recovery of tap water quality lasted several months despite ameliora- tive measures being implemented, including adding phosphate, reducing the overall proportion of the new water source, elevating the pH and alkalinity, and utilizing free chlorine as a disinfectant instead of chloramine. Adding phosphate was more effective and more practical than the other measures. The iron release rate was decreased after the addition of 1.5 mg. L-1 orthophosphate- P, tripolyphosphate-P and hexametaphosphate-P by 68%, 83% and 87%, respectively. Elevating the pH and alkalinity also reduced the iron release rate by 50%. However, the iron release rate did not decreased after replacing chloramine by 0.5-0.8 mg. L-1 of free chlorine as disinfectant.

关键词： iron release drinking water distribution system sulphate phosphate red water control waterquality stability

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Potential shift of bacterial community structure and corrosion-related bacteria in drinking water distribution pipeline driven by water source switching

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Frontiers of Environmental Science & Engineering 2021年第2期15卷 117-126页

作者： Yue Hu Ding Dong Kun Wan Chao Chen Xin Yu Huirong Lin Key Laboratory of Urban Environment and Health Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China College of Resources and Environment University of Chinese Academy of SciencesBeijing 100049China Research Institute for Environmental Innovation(Suzhou) TsinghuaSuzhou 215163China College of Environment&Ecology Xiamen UniversityXiamen 361102China School of Environment Tsinghua UniversityBeijing 100084China Department of Environmental Science and Engineering College of Chemical EngineeringHuaqiao UniversityXiamen 361021China

As a result of pollution in the present water sources,cities have been forced to utilize cleaner water *** are few reports regarding the potential shift of bacterial community structure driven by water source switching,especially that of corrosion-related *** types of finished water were used for simulation,the polluted source water from the Qiantang and Dongtiaoxi Rivers(China)was replaced by cleaner water from Qiandao Lake(China).Here,we discussed the transition effects through three simulated *** bacterial characteristics were identified using the highthroughput sequencing and heterotrophic plate count *** was observed that the level of culturable bacteria declined by 2–3 orders of magnitude after water source *** bacterial community released from the pipeline reactor was significantly different under different finished water,and it exhibited large variation at the genus ***(58.2%)and Phreatobacter(14.5%)clearly replaced Novosphingobium,Aquabacterium,and Cupriavidus as new dominant genera in system A,which could be attributed to the lower carbon and nitrogen content of the new water *** corrosion-inhibiting bacteria decreased after switching,they still maintained dominant in three reactors(6.6%,15.9%,and 19.7%).Furthermore,potential opportunistic pathogens such as Sphingomonas were *** study shows that after transition to a high quality water source,the total culturable bacteria released was in a downtrend,which leads to a great reduction in the risk of bacterial leakage in the produced drinking water.

关键词： drinking water biosafety water source switching drinking water distribution system Transition effects High-throughput sequencing

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Direct evidence of microbiological water quality changes on bacterial quantity and community caused by plumbing system

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Journal of Environmental Sciences 2022年第6期34卷 175-183页

作者： Jun Li Anran Ren Ed van der Mark Gang Liu Key Laboratory of drinking water Science and Technology Research Centre for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China Dunea water Company Plaza of the United Nations 11-15Zoetermeer 2700 ATthe Netherlands Sanitary engineering Department of Water managementFaculty of Civil Engineering and GeosciencesDelft University of TechnologyDelft 2600 GAthe Netherlands

drinking water quality deteriorates from treatment plant to customer taps, especially in the plumbing system. There is no direct evidence about what the differences are contributed by plumbing system. This study compared the water quality in the water main and at customer tap by preparing a sampling tap on the water main. The biomass was quantified by adenosine triphosphate(ATP) and the microbial community was profiled by 454 *** results showed that in distribution pipes, biofilm contributed >94% of the total biomass,while loose deposits showed little contribution(distribution of biological stable water had minor effects on the microbiocidal water quality regarding both quantity(ATP 1 ng/L vs. 1.7 ng/L) and community of the bacteria. Whereas the plumbing system has significant contribution to the increase of active biomass(1.7 ng/L vs. 2.9 ng/L) and the changes of bacterial community. The relative abundance of Sphingomonas spp. at tap(22%) was higher than that at water main(2%), while the relative abundance of Pseudomonas spp. in tap water(15%) was lower than that in the water from street water main(29%). Though only one location was prepared and studied, the present study showed that the protocol of making sampling tap on water main offered directly evidences about the impacts of plumbing system on tap water quality, which makes it possible to distinguish and study the processes in distribution system and plumbing system separately.

关键词： drinking water distribution system Plumbing system Microbiological water quality Sampling program 454 pyrosequencing

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Revealing the changes of bacterial community from water source to consumers tap:A full-scale investigation in eastern city of China

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Journal of Environmental Sciences 2020年第1期32卷 331-340页

作者： Xu Ma Guiwei Li Ruya Chen Ying Yu Hui Tao Guangming Zhang Baoyou Shi School of Environment&Natural Resource Renmin University of ChinaBeijing 100872China Key Laboratory of drinking water Science and Technology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China College of Environmental Science and Engineering Hohai UniversityNanjing 210098China

This study profiled the bacterial community variations of water from four water treatment systems,including coagulation,sedimentation,sand filtration,ozonation-biological activated carbon filtration(O3-BAC),disinfection,and the tap water after the distribution process in eastern *** results showed that different water treatment processes affected the bacterial community structure in different *** traditional treatment processes,including coagulation,sedimentation and sand filtration,reduced the total bacterial count,while they had little effect on the bacterial community structure in the treated water(before disinfection).Compared to the traditional treatment process,O3-BAC reduced the relative abundance of Sphingomonas in the finished *** addition,ozonation may play a role in reducing the relative abundance of *** and ClO2 had different effects on the bacterial community in the finished *** relative abundance of some bacteria(***,Phreatobacter and Porphyrobacter)increased in the finished water after ClO2 *** relative abundance of Mycobacterium and Legionella,which have been widely reported as waterborne opportunistic pathogens,increased after NaClO *** addition,some microorganisms proliferated and grew in the distribution system,which could lead to turbidity increases in the tap *** to those in the finished water,the relative abundance of Sphingomonas,Hyphomicrobium,Phreatobacter,Rheinheimera,Pseudomonas and Acinetobacter increased in the tap water disinfected with NaClO,while the relative abundance of Mycobacterium increased in the tap water disinfected with ***,this study provided the detailed variation in the bacterial community in the drinking water system.

关键词： Bacterial community water treatment process drinking water distribution system Opportunistic pathogen

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